Surgical pump



(H 0 Model.)

- J. H. LEWIS.

SURGICAL PUMP.

Patented Apr. 9, 1895.

Z0 6%); 688 e is.

UNITED STATES PATENT OFFICE.

JAMES H. LEWIS, OF NEW YORK, ASSIGNOR TO THE NATIONAL CASKET COMPANY, OF ONEIDA, NEW YORK.

SURGICAL PUMP.

' SPECIFICATION forming part of Letters Patent No. 537,049, dated April 9, 1895.

' Application filed October 29,- 1894. Serial No. 527,331. (No model-l To all whom it) may concern.-

Be it known that I, JAMES H. LEWIS, of New York, in the county of New York, State of New York, have invented certainnew and useful Improvements in Surgical Pumps; and I do 'hereb y declare the following to be a full, clear, and exact descriptionof the same, reference being had to the accompanying drawings, forming a part of this specification, and to the letters of reference marked thereon.

This invention relates to improvements in surgical pumps and more particularly to improveinents in that class in which a flexible tube is employed with a traveling compressor co-operating therewith to press the walls of the tube together gradually throughout a section of the tube, which section is ordinarily coiled in a cylindrical casing; and the invention has for its object to provide an improved means for adjusting the position of the come pressor, whereby the adjustment may be quickly,easily and accurately made, the parts of the device being so arranged that the construction is simple and yet exceedingly strong.

The invention consists in certain novel details of construction and combinations and arrangement of parts, all as will be now described, and pointed out particularly in the appended claims.

Referring to the accompanying drawings: Figure 1 is a front elevation of a surgical pump constructed in accordance with my present invention. Fig. 2 is a vertical section through the same. Fig. 3 is a perspective view of the traveling compressor and its oper-' ating handle removed from the casing.

Like letters of reference in the several figures indicate the same parts.

The cylindrical casing lettered A in the accompanyin g drawings is similar to those heretofore employed in pumps of this character, being usually struck up from sheet metal with a concave-convex back portion a and a front flange a forming between them a passage way in which the rubber tube or elastic conduit B is coiled, the ends of the latter being passed out through suitable apertures in the cylindrical casing and supported by clips 0.

A clamp D is adjustably fixed to a stem E on the casing by means of a set screw E, thus permitting of the device being easily and quickly affixed to a table, shelf or other support. It will be noted in this connection, that the stem E is vertically arranged and hence by means of the set screw E, the position of the casing with relation to the clamp may be changed, and what is of equally great importance, the parts may be easily and quickly separated for packing and cleaning. From the back of the casing a guide or stem F, adapted to form the journal for the traveling compressor, projects forward at the center of the casing, and upon it is journaled two frames, lettered respectively G and G having in their proximate faces guide ways G in which the U-frame H carrying at its outer end the compressor roller I is adapted to slide. The arms of the frame H are provided with slots h, through which the journal F passes. Thus the said frame H may be moved back and forth independently of the said journal F, which latter may thus be made a fixture in the casing.

The outer frame G is extended in the form of a slotted handle base G and'at a point approximately opposite the end of the frame G it is provided with an aperture for the reception of the stem of the right and left screw K, the inner end of which is journaled in the inner frame G and upon which are mounted two blocks or wedges L adapted when the screw is rotated to be moved toward and from each other and by co-operating with correspondingly inclined surfaces H on the frame H, advances the said frame H and compressor roller. The construction of this'particular portion of the apparatus is extremely simple and if reference be had to Fig. 2 it will be seen that the right and left hand screw is provided with a collar or flange k. In assembling the parts the said screw is held against outward movement by this collar or flange co-operating with the inner face of the frame G and inasmuch as the said frames G and G are held in place upon the journal F by the set screw f too 1-1 and blocks and prevent the rotation of the blocks with the screw, they are each provided with a vertical slot or wayl in which a flange h is adapted to work and in order to turn and lock the screw itis provided on the outside of the handle frame G with a square section and thumb nut M working thereon and a locking nut N screwing on the extreme outerend, the usual Washers such as m and n being interposed to secure greater accuracy of adj ustment. To adjust the device it will now be seen that it is only necessary to loosen the lock nut N and turn the screw until the compressor frame has moved to the proper point and then again lock the parts in position by means of the aforesaid lock nut.

The operating parts of the adj usting mechanism it will be observed are carried on the handle frame at the front of the casing in position to be observed and readily and conveniently reached at any instant.

The handle itself lettered O is provided on theinner end with afork or bifurcated portion adapted to receive the slotted end of the handle frame, and with aset screw and thumb nut 0 0', by means of which, the parts may be firmly clamped together, this construction being desirable to carry outthe idea before mentioned of enabling the parts to be folded or packed in very small compass.

It will be observed that the pressure of the wedging blocks upon the compressor frame advances the same squarely and in fact the compressor frame and handle frame are so connected that there will be no unequal yielding due to the particular position of the flexible conduit, which fact is importantin pumps of this character where the tube is coiled in the casing so to speak, and the resistance is first at one end of the roller and then at the other. So too, it will be observed that by the employment of the oppositely moving wedging blocks and oppositely arranged inclined bearings, a wide range of adjustment is secured, with a very thin or narrow casing, making-the whole device neat and compact.

Having thus described my invention, what I claim as new is- 1. In a surgical pump, such as herein described, the combination with the curved casand cooperating inclined surfaces interposed between the handle frame and compressor frame substantially as described.

2. In a surgical pump, the combination with the cylindrical casin g having the central j ournal, the flexible conduit coiled in the casing and the handle frame rotating on said journal and having guide ways therein, of the compressor frame carrying the roller at the outer end, working in said guide ways and having slots for the passage of the central j ournal,the oppositely arrangcdinclined bearings on said compressor frame, the right and left hand screw journaled in the handle frame and the wedge blocks traveling on said screw and cooperating with the inclined bearings on the compressor frame, whereby said frame is advanced squarely against the flexible conduit; substantially as described.

3. In asurgical pump, the combination with the casing, the central journal carried in the casing, the flexible conduit the independent handle frames mounted on the central journal and having bearings or guides in their proximate faces and the right and left hand screw connecting said handle frames at one side of the center journal and having the turning and locking nuts on the outer end, of the U-shaped compressor frame having the inclined bearings at the inner end, the slots for the passage of the central journal and the compressor roller at the outer ends, and the wedging blocks working on the right and left hand screw and cooperating with the inclined hearings on the compressor frame to advance the latter, with guides to hold said inclined bearings and blocks in engagement; substantially as described.

JAMES H. LEWIS.

Witnesses:

LORENZO LOVEJOY, J r., M. J. FITZGERALD. 

